Brake



H. F. PARKER May`21, 1935.

BRAKEv Filed may 17, 1930 iii! jwmrbx HUMPHREY F. PARKER A TTORNEY Patented Mayl 21, 1935 s i UNITED STATES PATENT-*OFFICE BRAKE Humphrey F. Parker, South Bend, Ind.', assignor to Bendix Brake Company, South Bend, Ind., a corporation of Illinois Application May 17, 1930,'Serial No. 453,390

9 Claims. (Cl. 18S-78) This invention relates to brakes and more the friction elements are conventional. Each particularly to internal expanding brakes. compriSeS a rim 22 Supported by a Suitable Web An objectrof the invention is to provide a sim- 23 and the rim has a suitable lining 24 secured ple and inexpensive operating member for the thereto adaptable for co-operation with the ra- 5 friction elements of abrake. dius of the drum. 5 Another object of the invention is to provide The articulated ends of the shoes are connected an operating member for the friction elements by an adjusting member 25 and the separable of a brake in which equal action between the ends which are supported on the anchors .i4 and friction elements is attained I5 are equipped with reinforcing plates 26. These lo A further object of theinvention is to provide plates are arranged on the respective sides of l` a member for actuating the friction elements of the web and the plateS and WebS are prOVided With a brake wherein the applied forces may be malugs or projections 21 and notches 28, the object of terially increased or multiplied. Which Will hereinafter appeal'- Yet a further object of the invention is to pro- AS Shown, the friction members 20 and 2l are I vide a member for actuating the friction elements Connected by a coil spring 29 and the member 20 l5 of a brake with a balanced action between the is connected by a coil spring 3|] to the backing friction elements. plate. These springs serve to return the friction still a further object of the invention is to proyelements to the off position when the brakes vide an operating member for the friction eleare released and to retain the `friction ele- ;o ments of a brake supported on the separable ends ments against the anchors and an adjustable stop of the friction elements, so that contact or en- 3| pOSitiOned 0n the backing plate.

gagement with the operating member is main- Aoating Operatingmembel'32iSS11ppOrtedbetaned at all times regardless of the position tween the separable ends of -the friction elements. thereof. This member comprises an arm 33 adaptable for :.3 An important feature of the invention is a engagement With the lateral prOJ'eCtiOn I9 On the 25 oating operating member for actuating the fric- Crank arm Secured t0 the Operating Shaft |5- The tion elements of a brake supported on the Separm 33 has a lateral projection 34 in which studs arable ends of the friction elements. 35 and 36 are pOSitiOned. These Studs SllppOrt a Other objects and structural details of the plate 3l in Spaeed relatiOn t0 the lateral prOJ'eC- :io invention will be apparent from the subjoined tion 34.

description in connection with the accompanying AS Shown, the lateral projection 34 andthe plate drawing, in which: 31 engage the reinforcing plates on the respective Figure 1 is a vertical sectional view just, back sides of the friction elements to provide suitable of the disk portion of the brake drum illustrating guides for the Operating member. The StudS 35 S5 the friction members in elevation; and and 36 are adaptable fOr engagement With the 35 Figure 2 is a sectional view substantially on respective ends of the friction element. The stud line 2-2, Figure 1. 36 is seated in the notch 28 and is engaged by the Referring to the drawing for more specific de- 111g 01' prOJ'eCtiOn 2l Which nOrmally suspends the tails of the invention, Io represents a fixed supoperatingy member in proper relation to the fricport such as a backing plate having associated tion elements- TheSe Studs are preferably prO- 40 therewith a rotatable drum I I which may be sevided with thrust rollers which materially imprOVe cured to a wheel, not shown y the structure, since they provide for a smooth op- Thel backing plate I0 is provided with rein'forceration in actuating the friction elements for ening plates I2 and I3 suitably secured in position sagement With the drum. Y

by 'anchors M andA I5 and positioned between the The Operating member iS the salient feature of 45 anchors I4 and I5 is an operating shaft I6. As this inVentiOn- It pIOVif-leS an eXOeptiOnallY Simshown, the operating shaft is positionedfor rople and eCient means fOr actuating the friction tation in a suitable bearing I1 mounted in regiselements-Comprising a Single floating lever Suptering apertures in the backing plate l0 and p0rted Solely on the movable or separable ends 5o reinforcing plates I2 and I3. The operating shaft of the friction elements and embodies means for 50 has secured thereto a crank I8, the free end of multiplying the leverage to increase the applied which is provided with a lateral projection I9, forces in the actuation of the friction elements. the object of which will hereinafter appear. Although this invention has been described in Positioned for movement on the anchors I4 and connection with certain specific embodiments, the 4I5 are friction elements 20 and 2I. As shown, principles involved are susceptible of numerous 55 sons skilled in the art. The invention isf, therefore, to be limited only by the scope of the appended claims.

Having thus described the various features of the invention, what I claim as new and desire to secure by Letters Patent is:

1. A brake comprising a xed support, a plurality of friction elements positioned for movement on the support, an operating shaft positioned for rotation `on the support, an operating member extending substantially at right angles to a radius of the brake passing through the operating shaft and supported on the separable ends of the friction members and means floatingly connecting the operating member with the operating shaft lying between the support and operating member.

2. A brake comprising a friction element having separable ends provided with notches and cam surfaces and an operating lever having thrust members engaging one notch and one cam surface.

3. A brake comprising afriction element having separable ends provided with oppositely disposed notches and cam surfaces, an operating lever and thrust members on the operating lever engaging the notches and cam surfaces.

4. A brake comprising a friction element having separable ends each provided with a' notch, in oppositely disposed relation, an operating lever having a pair of thrust members one of vwhich is retained in the notches and the other of which engages the shoe ends adjacent the notches.

5. A brake comprising a frictionelement having separable ends each provided with an oppositely arranged notch, lugson the separable ends adjacent the notches, an operating member having a pair of thrust members one 0f which is confined between the notches by the lugs and the other other applications that will readily occur to perof which engages the shoe ends adjacent the notches.

6. A brake comprising a drum, oatingfriction means having separable ends, an operating means for spreading the adjacent ends of said friction means free to float therewith,`anchor means for the ends of said friction means, and a second lever extending substantially at right angles to a radius of the brake passing between the adjacent ends pivoted adjacent said ends and anchor and adaptedV to disconnectedly turn in the same direction and drive said operating means substantially free from the effect of floating thereof.

7. A brake comprising a backing plate, a float-Al on one of said levers slidably engaging the other.

8. A brake comprising a backing plate, a floating friction shoe, a floating actuating lever, a pivoted lever, one of said levers being substantially between the other and the backing plate and means providing a floating connection between w said levers, said levers extending substantially perpendicular to a radius through the pivot of said pivoted lever.

9. A brake comprising a backing plate, a floating friction shoe having a web, an actuating lever adapted to float with said shoe extending between the web of said shoe and said backing plate, a lever pivoted on the backing plate adjacent the floating center of rotation of said actuating lever and extending between the shoe web and back- I'.

ing plate, and means on one of said levers for floatingly engaging the other.

HUMPHREY F. PARKER. 

